Normal-state sup 63 Cu Knight shift and hole-band modification in Y sub 1 minus x Pr sub x Ba sub 2 Cu sub 3 O sub 7

Journal Article · Tue May 01 04:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.344714· OSTI ID:6948021

Reyes, A P; MacLaughlin, D E ^[1]; Takigawa, M; Hammel, P C; Heffner, R H; Thompson, J D ^[2]; Crow, J E; Kebede, A; Mihalisin, T; Schwegler, J ^[3]

---

1. University of California, Riverside, California 92521 (USA)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
3. Temple University, Philadelphia, Pennsylvania 19122 (USA)

The {sup 63}Cu NMR Knight shift {ital K} has been measured in oriented powder samples of normal-state Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7}, {ital x}=0.2 and 0.4. At plane Cu sites {ital K} is found to decrease with Pr doping, and a temperature dependence ({ital dK}/{ital dT}{gt}0) develops. The variation of {ital K} with bulk susceptibility {chi} is considerably greater than can be explained using RKKY coupling between Pr spins and Cu nuclei, and the temperature variation of {ital K} resembles that of {chi} in high-{ital T}{sub {ital c}} systems with reduced conduction-hole concentration. These results are consistent with the view that Pr impurities significantly modify conduction-band properties, rather than acting as a conventional'' pair-breaking mechanism.

• OSTI ID: 6948021
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 67:9; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER 63
COPPER COMPOUNDS
COPPER ISOTOPES
COPPER OXIDES
ELECTRONIC STRUCTURE
HOLES
INTERMEDIATE MASS NUCLEI
ISOTOPES
KNIGHT SHIFT
MAGNETIC RESONANCE
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ODD-EVEN NUCLEI
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
POWDERS
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RARE EARTH COMPOUNDS
RESONANCE
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES